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eimsori [14]
3 years ago
7

A calcium ion has a +2 oxidation number it has 20 protons and _____ electrons.

Chemistry
1 answer:
EleoNora [17]3 years ago
4 0
A calcium ion has 20 protons and 18 electrons.
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A sample of gas has an initial volume of 3.62 L at a pressure of 0.987 atm. If the volume of the gas decreases to 2.50 L, what w
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Answer:

0.033 atm

Explanation:

PV=nRT

rule of 1 for T and n

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3 0
3 years ago
The diagram shows four different locations in an atom.
Ainat [17]

Answer:

The answer is 1 and 4.

Explanation:

Mass is most concentrated in the nucelus of an atom. Therefore, if you are looking to find the area with the least mass, go outside of the nucelus. Points one and four are the furthest outside of the nucleus.

5 0
3 years ago
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\qquad \qquad\huge \underline{\boxed{\sf Answer}}

Here's the balanced equation for given Double displacement reaction ~

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4 0
2 years ago
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If 1/4 cups are in 1 serving jow many servings are in 4 cups​
mote1985 [20]

Answer:

One serving is 1/4 cup therefore 1 cup would be 4 servings. Since we have 9 cups we would then multiply 9 x 4 and the answer would be 36 servings. You have a ratio of cups to serving, so 1/4 cup : 1 serving, or .

Explanation:

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3 years ago
The sun's energy turns the ice in the core of the comet to gas, and the solar wind pushes the gas away from the sun. The tail th
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I think this should be true...

As a comet gets closer to the sun, the ice on the surface of the nucleus begins turning into gas, forming a cloud known as the coma. ... Since comet tails are shaped by sunlight and the solar wind, they always point away from the sun.

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4 years ago
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